Trolley.



W. W, HUTGHINGSON.

v TROLLBY. APPLICATION rmm we. 1, 1008.

' 963,571. I I Patent ed July5, 1910.

WITNESSES 1 S ll IN VENT 0H,

ATTORNEYS WEm/w'r sm.

UNITED STATES PATENT OFFICE.

WILLIAM W. I-IUTCHINGSON, OF BROOKLYN, NEW YORK.

TROLLEY.

To all whom it may concern:

Be it known that I, WILLIAM W. HuronrNesoN, a citizen of the UnitedStates, residing at Brooklyn, in the county of Kings and State of NewYork, have invented new and useful Improvements in Trolleys, of whichthe following is a specification.-

This invention relates to trolleys and its object is to provide certainmeans to retain the trolley in engagement with its wire and to decreasethe tendency of same to leave the wire as will be more fully describedin the following specification, set forth in the claim and illustratedin the drawings, where:

Figure 1 is a side elevation of the improved trolley on its wire. Fig. 2is a sectional view through same. Fig. 3 is a Sectional view at a rlghtangle to above. Fig. 4- is a sectional view on the line 4r-4- of Fig. 2.

This invention is adapted to retain the trolley on its wire and in orderto accomplish this desirable end it is found necessary to provide .thetrolley with means which permit of its turning on its stem so that itwill pass uneven points on the wire and not be thrown off by same norwill it leave the wire in turning curves as is frequently the case.

The trolley wheel 5 is of ordinary con struction with the groove 6 forthe wire and is mounted on the axle 7 which is journaled in the yoke 8.This yoke has at its lower end a stem 9 which enters a socket 10 in ablock 11 which is secured by means of the pins 12 to the upper end ofthe trolley pole 13, and in one side of the stem 9 is a groove 14extending about half way around the stem to receive the stud 15projecting from the block 11. This stud allows the stem to turn in theblock but not pass a right Specification of Letters Patent.

Application filed August 1, 1908.

Patented July 5, 1910. Serial No. 446,443.

angle from its normal position and to return the trolley to its positionparallel with the trolley wire a coiled spring 16 is seated in theenlarged lower end of the socket and its ends 17 and 18 enterperforations in the stem and in the block so that when the stem isturned the spring is put under tension and when the force that turns thestem is released the spring returns the trolley to the position to carrythe wire in its circumferential groove. The spring expands when the stemis turned one way and contracts in the other so to provide for theexpansion the enlarged portion 19 of the socket and to keep out dirt andmoisture the stem has a flange 20 at its upper end. The trolley as soconstructed will follow the trolley wire notwithstanding itsimperfections and curves and its extreme simplicity and few parts willprevent its getting out of order or easily wearing.

It is obvious that the parts may be altered or otherwise arrangedWithout departing from the essential features above described.

What I claim as new and desire to secure by Letters Patent is:

In a trolley, the combination with a trolley pole and socketed block, ofa yoke for the wheel, a stem at the lower end of the yoke and having. agroove partly surrounding it, a pin in the block and entering thegroove, a spring at the bottom of the socket and attached to same andthe stud, and a flange 011 the stem at the mouth of the socket.

In testimony whereof I affix my signature in presence of two witnesses.

WVILLIAM W. HUTCHINGSON.

Witnesses THOMAS F. MODONOUGH, THOMAS N. SHANNON.

